![](/themes/nam_theme/assets/img/namouflage--jagged--dark-purple.png)
Online Collection
Mk 5 Heliograph, 1915
Heliographs used a small mirror mounted on a tripod to reflect sunlight in order to flash messages in Morse code. In clear weather conditions and on open terrain their signals could be seen many miles away.
NAM Accession Number
NAM. 1982-05-43-1
Copyright/Ownership
National Army Museum Copyright
Location
National Army Museum, Study Collection
Object URL
https://collection.nam.ac.uk/detail.php?acc=1982-05-43-1